Bug 1732343 - Part 1: Better support for moveonly types in IPDL, r=handyman

In part 2 of this patch, a large number of messages are being converted to
contain move-only types, both as direct arguments and within compound data
structures. This revealed some limitations in IPDL's handling of moveonly
types, which this patch hopes to rectify. This also required changes to allow
distinguishing between types which require move to send vs. them not having a
move constructor.

This does not fully fix the underlying issues, but attempts to preserve
existing behaviour while improving support for the new types being added. There
should be further cleanup in the future.

Differential Revision: https://phabricator.services.mozilla.com/D126563